Improvement in compositions for covering boilers



I06. COMPOSITIONS,

COATING OR PLASTIC.

UNITED STATES PATENT OFFICE.

IMPROVEMENT IN COMPOSITIONS FOR COVERING BOILERS, &c.

Specification forming part of Letters Patent No. 148,972, dated March24, 1874; application filed August 9, 1673.

To all whom 1' imay concern:

Be it known that 1, CHARLES M. OHARA, of Fall River, in the county ofBristol and State of Massachusetts, have invented certain new and usefulImprovements in Non-Gonducting Compositions; and I do hereby dcclarethat the following is a full, clear, and exa ct description thereof.

The invention consists of acomposition formed by the combination oradmixture of ashes with the silicate of soda or other silicate. Theobject of the above combination is to form a ccllularcmnposition which,when dry, becomes an efficient non-conducting covering for preventingthe escape of heat from the surfaces of boilers, steam-pipes, or otherstructures, the composition aforesaid being, when dry, highly cellular,and every cell a vacuum. The passage of heat through it is therebygreatly obstructed.

The mode of preparing the said composition is to mix a required quantityof ashes with liguid silicate till the ashes are reduced to a p as 10com 10011. The ashes should be premy own I attix my signature inpresence of two witnesses.

CHARLES M. OHARA.

'itnesses:

WALTER OHARA, WM. SANFORD.

